MacBook Pro, 10 core M1 Max, 64 GB, OS Sonoma 14.5, Lightroom Classic v13.4. Select five Canon R5 .dng images in LR, select File->‘Export with Preset’ menu item, select NIK HDR Efex from export list. LR progress shows image files being duplicated (much too quick). HDR Efex auto-launches but presents error dialog shows all image files as .dng, NOT .tif. Can’t open raw files.
I have inspected the export template and it correctly shows a tiff export file format but no such files can be found. While this might seem to be a LR problem, no other LR extensions have any difficulties making .tiff copies from .dng files.
NOTE: I can manually export these same images as .tif files from LR. The duplicate/save time is considerable, 15-20 seconds for a single image file resulting in a 268 MB .tif file from a 48.7 MB .dng file.
Is my “old” MacBook pro (late 2021) just too slow? But the “export” progress time for 5 images is less than 15 seconds.